Browsing 2014 by Issue Date

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  • Human interface of complex electronic system for monitoring and diagnostics in medicine 
    ŞONTEA, Victor; IAVORSCHI, Anatolie; LAZARI, Eugen; LUCHIŢA, Mihai; ARPENTII, Nicolae (Tehnica UTM, 2014)
    Article presents the design and development of interface between complex system for diagnostics and medical monitoring, composed of modules and devices to collect biomedical parameters and signals from the human body and ...
  • Optimization of light action spectra for porphyrins in vivo 
    BARUN, V.; DICK, S.; SONTEA, V.; ABRAMOVICH, N.; SERYAKOV, A. (Tehnica UTM, 2014)
    Light action spectra for main skin chromophores are simulated. Porphyrins are selected as target chromophores. They can produce singlet oxygen (SO) reactions under tissue irradiation, which acts as a natural photosensitizer. ...
  • Proprietăţile electrice ale celulei fotovoltaice cu joncţiune reliefată fabricată prin HVPE 
    BARANOV, Simion; GORCEAC, Leonid; CINIC, Boris (Tehnica UTM, 2014)
    In this report we are represented the electro-physical properties of the photovoltaic cell with single relief junction fabricated on gallium arsenide substrate by HVPE method. This cell have the shunt resistance of 3.8 ...
  • Structure features of protocrystalline silicon films 
    VORONTSOV, Alexander; EMELYANOV, Andrey; FORSH, Pavel; KONSTANTINOVA, Elizaveta; KASHKAROV, Pavel (Tehnica UTM, 2014)
    The structural and electronic properties of thin protocrystalline silicon films obtained by plasma-enhanced chemical vapor deposition from hydrogen (H2) and monosilane (SiH4) gas mixture have been studied by means of ...
  • Particularitățile relaxării spinului electronilor în antimonidul de galiu dopat cu fier 
    GHEORGHIȚĂ, Andrian; GHEORGHIȚĂ, Eugen; GUȚULEAC, Leonid; MIHĂLACHE, Alexei (Tehnica UTM, 2014)
    The present paper analyzes the influence of iron upon mechanisms of the spin relaxation in the gallium antimonide, doped with iron in concentrations of up to 3% at. It is demonstrated, that the for low concentrations of ...
  • Algorithms of synchronous vector modulation for hybrid multi-converter six-phase system 
    OLESCHUK, Valentin; ERMURATSKII, Vladimir (Tehnica UTM, 2014)
    Topology of dual three-phase (six-phase) adjustable speed motor drives can be based on two standard inverters and two neutral-point-clamped converters. Control of these systems in accordance with specialized schemes and ...
  • Voltage regulators with limited capacity power supply and Non-Euclidean geometry 
    PENIN, Alexandr; SIDORENKO, Anatolie (Tehnica UTM, 2014)
    The restriction of load power, two–valued regulation characteristic, and interference of several loads is observed in power supply systems with limited power of voltage source. The approach for interpretation of changes ...
  • Detection in the contacts with bismuth-antimony alloy: role of contact material and influence of the surface states properties 
    KERNER, Iacov (Tehnica UTM, 2014)
    Diode detectors (DD) are widely used in electronic information and communication systems. In this paper the numerical modeling of the electrical potential distribution and current passing in the contacts of niobium nitride ...
  • Măsurătoare tehnologice de rezistenţă liniară a microconductorului izolat 
    NASTAS, Vitalie (Tehnica UTM, 2014)
    The paper contributes to solution of the problem of resistance control of overglaze microwire in the technological operations of casting and winding of resistive components. The model of (the) measured objects in this ...
  • Optical and photoelectrical features in nanocrystalline indium oxide 
    FORSH, Ekaterina; MARTYSHOV, Mikhail; FORSH, Pavel; KASHKAROV, Pavel (Tehnica UTM, 2014)
    Spectral dependencies of absorption coefficient and persistent photoconductivity in nanocrystalline indium oxide (In2O3) are studied. Nanostructured In2O3 samples with various nanocrystals size are prepared by sol-gel ...
  • Effect of p-NiO interlayer on efficiency of p-GaN/n-ZnO LED devices 
    SIRKELI, Vadim P.; YILMAZOGLU, Oktay; KÜPPERS, Franko; HARTNAGEL, L. (Tehnica UTM, 2014)
    We report on numerical study of the characteristics of p-GaN/n-ZnO light-emitting diodes with p-NiO interlayer, and on LED design optimization which includes bandgap engineering, thickness and doping of constituent layers. ...
  • Photoluminescence of hydrogenated nanocrystalline silicon films 
    EMELYANOV, Andrey; KAZANSKII, Andrey; FORSH, Pavel; ZHIGUNOV, Denis; KHENKIN, Mark; KASHKAROV, Pavel (Tehnica UTM, 2014)
    We have studied structural, electrical and photoluminescence properties of hydrogenated nanocrystalline silicon films with different crystalline volume fractions (from 0 – pristine amorphous silicon – to 55 %). The ...
  • Продольное магнитосопротивление и осцилляции Шубникова де Гааза в нитях висмута легированных Sn 
    НИКОЛАЕВА, А.; КОНОПКО, Л.; ЦУРКАН, А.; ПАРА, Г.; БОТНАРЬ, О. (Tehnica UTM, 2014)
    В данной работе представлены результаты исследования Шубников де Газ осцилляцийв монокристаллических нитях висмута легированного акцепторной примесью Sn до 0.07ат%. Нити получались литьем из жидкой фазы в стеклянной оболочке ...
  • Quantum size effect in semimetal bismuth antimony wires and films 
    NIKOLAEVA, Albina; KONOPKO, Leonid; GRABOV, Vladimir; DEMIDOV, Evghenii; KABLUKOVA, Natalia; KOMAROV, Vladimir; POPOV, Ivan (Tehnica UTM, 2014)
    — We present the experimental results of an investigation of the electron transport of semimetal single- crystal Bi1-xSbx films and wires in temperature range 4.2-300 K. Bi-3at.%Sb films were prepared by the vacuum discrete ...
  • Electron transfer dynamics as regulator of biological activity in biomolecular systems coordinated by trimer nanoclusters 
    YALTYCHENKO, O.V.; KANAROVSKII, E.Yu. (Tehnica UTM, 2014)
    In the given paper the minimal theoretical model for the description of kinetic processes in the organic nanocomposite material is offered. The subject of simulation is a three-center nanocluster embedded in an organic ...
  • Cercetarea proprietăţilor senzoriale ale peliculelor nanocristaline de Cu1-xZnxOy 
    CREŢU, Vasilii; POSTICA, Vasile; ABABII, Nicolai; TROFIM, Viorel; SONTEA, Victor; LUPAN, Oleg (Tehnica UTM, 2014)
    Peliculele nanocristaline de Cu1-xZnxOy au fost depuse folosind metoda sintezei chimică din soluţii (SCS). Pentru cercetările senzorice ale peliculelor depuse probele au fost tratate termic în sobă (TA) sau/şi tratate ...
  • Effect of doping in Zn1-xAgxOy nanostructured films on Hydrogen gas response 
    POSTICA, Vasile; CRETU, Vasilii; ABABII, Nicolai; VERJBITKI, Valeri; SONTEA, Victor; LUPAN, Oleg (Tehnica UTM, 2014)
    Nanostructured Zn1-xAgxOy films have been deposited using a chemical solution synthesis method. The as-deposited nanostructured films were subjected to thermal annealing in furnace and rapid thermal annealing, for different ...
  • Materials for Integrated of THz sensors in EWOD chips 
    SIRBU, Lilian; MULLER, Raluca; DANILA, Mihai; SCHIOPU, Vasilica; MATEI, Alina; COMANESCU, Florin; STEFAN, Angela; BARACU, Angela; DASCALU, Traian (Tehnica UTM, 2014)
    We developed a technology for deposition of metal contacts/wires upon nanoporous InP thin film structures and RF sputtered InP films. Indium phosphide (InP) films were deposited onto glass substrate using RF magnetron ...
  • Photoconductivity relaxation in nanostructured InP 
    POSTOLACHE, Vitalie; MONAICO, Eduard; BORODIN, Eugeniu; LUPAN, Oleg; URSAKI, Veaceslav; ADELUNG, Rainer; NIELSH, Kornelius; TIGINYANU, Ion (Tehnica UTM, 2014)
    We show that long-duration-photoconductivity decay (LDPCD) and persistent photoconductivity (PPC) in porous InP structures produced by anodization of InP substrates can be controlled through the control of their morphology. ...
  • Microstructuring of silicon crystal surface for solar cell application 
    GRABCO, D.; PRISACARU, A.; SHIKIMAKA, O.; HAREA, E.; PYRTSAC, C.; BRANISHTE, T. (Tehnica UTM, 2014)
    In this paper we developed mechano-chemical methods of structuring the surface of crystals Si (100) for use as substrates for solar cells. It was found that from all studied mechanical methods the 'scratching' one is more ...

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